For the full log of gretl changes since January 2000, see
<@url="http://gretl.sourceforge.net/ChangeLog.html">.

2019-07-02 version 2019c
- Fix bug: "dataset sortby" not handling missing values
  correctly on MS Windows
- Fix bug: possible crash on using the "fcast" command for
  out-of-sample forecasting after estimation of a VAR
- Fix bug: typeof() function not working correctly for
  string objects inside bundles and arrays
- Fix bug: robust variant of "chow" failing in case of
  exact collinearity in the augmented regression
- New function fzero(): find a root of a nonlinear function
- New function conv2d(): 2-dimensional convolution of two
  matrices
- New function flatten(): reduce array of matrices to single
  matrix or array of strings to single string
- New function msplitby(): split a matrix into an array of
  matrices
- "gnuplot" and "plot": add support for scriptable "recession
  bars"
- GUI plot editor: try to ensure that choice of font carries
  over in copying a plot to the clipboard
- svm() function: add support for ordinal data, plus small
  interface improvements
- mread() function: enable reading of delimited text matrix
  files, non-conformant with the mwrite() format
- sscanf() function: support conversion of an array of numeric
  strings to a column vector
- GUI model table: show up to three "significance" stars
- Remove the deprecated function isstring()
